Daikin AT12BV1LS Pocket Manual page 86

Si10-417
5.2.30 CT or Related Abnormality
Remote
Controller
Display
Method of
Malfunction
Detection
Malfunction
Decision
Conditions
Supposed
Causes
Trouble
shooting
Check No.12
Refer to
P.163
Service Diagnosis
H8
A CT or related error is detected by checking the
compressor running frequency and CT-detected input
current.
The compressor running frequency is below 62 Hz and
the CT input is below 0.1 V.
(The input current is also below 0.5 A.)
If this error repeats 4 times, the system will be shut
down.
The error counter will reset itself if this or any other
error does not occur during the following 60-minute
compressor running time (total time).
Power transistor defective
Internal wiring broken or in poor contact
Reactor defective
Outdoor unit PCB defective
Be sure to turn off power switch before connect or
Caution disconnect connector, or parts damage may be occurred.
Turn off the power and turn it
on again.
Get the system started.
∗ Running
current as shown at right
with relay cable
1 or 2?
NO
Check No. 12
Check the capacitor voltage.
DC290~380V?
NO
Measure the rectifier input
voltage.
Voltage
within the allowable
range (Supply
voltage±15%)?
NO
Troubleshooting
YES
Replace the outdoor
unit PCB.
Current Capacitor charged
(guideline) when the indoor unit
or outdoor unit main
relay turns on
Rising with increasing
frequency
YES
2 sec
A
YES
Replace the outdoor
unit PCB.
Check the supply
voltage.
Time
85